Woo, S B, Schacterle, R S, Komaroff, A L et al. · Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics · 2000 · DOI
Researchers examined tiny salivary glands in the lips of 11 ME/CFS patients and compared them to healthy controls. They found that ME/CFS patients had various changes in these glands, including swelling, scarring, and immune cell infiltration. Most notably, ME/CFS patients had significantly more mast cells (immune cells) in their salivary glands than controls, suggesting these glands may be damaged in ME/CFS.
This study provides preliminary histologic evidence of objective pathology in ME/CFS, potentially supporting the biological basis of the disease rather than purely functional causes. The identification of increased mast cell infiltration may point toward an immune or inflammatory mechanism in ME/CFS, which could guide future diagnostic and therapeutic research.
This study does not prove that salivary gland changes cause ME/CFS symptoms or that they are specific to ME/CFS rather than found in other conditions. The small sample size and preliminary nature mean findings require confirmation in larger, well-controlled studies before clinical application. Histologic changes do not establish whether they contribute to fatigue or other ME/CFS symptoms.
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
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